The Dark Knight Rises - and crashes: Students discover Batman's cape gliding technique is fatally flawed

Jul 09, 2012

(Phys.org) -- Batman returns to cinemas for the Dark Knight Rises this month (July 20) - but unless he has invested in a new cape, he may fall into some trouble.

Physics students have calculated that the superhero's method of using his cape to glide from tall buildings - as seen in Christopher Nolan's Batman Begins - would result in him hitting the ground at life-threateningly high speeds.

In the film, the caped crusader - played by Christian Bale - wears a cape which becomes rigid when a current is passed through it, allowing him to glide over Gotham City in a similar manner to a base jumper in a wingsuit.

Four MPhys students from the University of Leicester have published a paper claiming that although this method of gliding would be possible, Batman would be likely to suffer a fatal collision when he reached the ground.

Due to the high speeds he would be travelling, his impact with the ground would be equivalent to him being struck by a car travelling at 50 miles per hour.

David Marshall, Tom Hands, Ian Griffiths and Gareth Douglas found that the of Batman's cape - at 4.7 metres - is around half that used by a hang glider.

If Batman jumped from a building 150 metres high, he could glide a distance of around 350 metres - but the problem arises as Batman's velocity increases during his descent.

His velocity would initially rise to around 68 miles per hour, before reaching a steady 50 miles per hour as he gets down to ground level - a speed too fast for him to land safely.

The group concluded that DC Comics' superhero should consider taking a with him if he wanted to stay in one piece.

David Marshall, 22, said: "If Batman wanted to survive the flight, he would definitely need a bigger cape. Or if he preferred to keep his style intact he could opt for using active propulsion, such as jets to keep himself aloft.

"If he really wanted to stick with tradition he could follow the method of Gary Connery, who recently became the first person to glide to the ground from a helicopter using only a wingsuit, although he only made it down safely using a large number of cardboard boxes."

The paper, entitled 'Trajectory of a falling ' was published in this year’s University of Leicester Journal of Special Physics Topics.

The journal is published every year, and features original short papers written by students in the final year of their four-year Master of Physics degree.

David added: "This was an enjoyable module to be involved with, but it was also a lot harder work than it sounds. Each fortnight we had to write our own papers, review the papers of other groups, make corrections to our reviewed papers and put together an editorial board meeting to discuss the outcomes for the papers currently in the process of review.

"Choosing creative projects did make the task a little easier and more interesting. I believe the module is worthwhile, as learning how to approach new problems is an important part of being a physicist."

Course leader Dr Mervyn Roy, a lecturer at the University’s Department of Physics and Astronomy, said: “A lot of the papers published in the Journal are on subjects that are amusing, topical, or a bit off-the-wall. Our fourth years are nothing if not creative! But, to be a research physicist - in industry or academia - you need to show some imagination, to think outside the box, and this is certainly something that the module allows our students to practice.

“Most of our masters students hope to go on to careers in research where a lot of their time will be taken up with scientific publishing - writing and submitting papers, and writing and responding to referee reports.

“This is another area where the module really helps. Because Physics Special Topics is run exactly like a professional journal, the students get the chance to develop all the skills they will need when dealing with high profile journals like Nature or Science later on in life.”

Explore further: Best of Last Week – Evidence of quark-gluon interactions, new portable device hack and why we may never live forever

More information: You can read the full paper here: physics.le.ac.uk/journals/inde… article/view/484/289

The latest issue of the University of Leicester’s Journal of Physics Special Topics here: physics.le.ac.uk/journals/inde… hp/pst/issue/current

add to favorites email to friend print save as pdf

Related Stories

The science behind the cape

Mar 08, 2011

What do you have when you line up a martial artist, acrobatic gymnast, police officer, firefighter, NASCAR driver, and NFL running back? "Watson," the IBM super-computer that recently routed humanity's best ...

Review: 'Arkham Asylum' is Batman at his best

Aug 26, 2009

(AP) -- The video-game industry has defeated more superheroes than Lex Luthor could ever dream of. Superman, Aquaman, Iron Man, X-Men: All rendered lifeless by forces more focused on making a buck than on ...

It's a bird, it's a plane, it's super hero sexism

Dec 21, 2011

As parents do their final holiday shopping, comic books, and their related superhero-themed toys and children's gear, continue to be popular. From Batman rain boots and Legos, to paperback books about Wonder Woman, many stores ...

APS announces Physics, a new, free, online publication

Sep 19, 2008

Finding the best in physics now becomes easier with the formal launch of Physics, http://physics.aps.org/ a new, free, online publication from the American Physical Society. Physics will highlight and provide commentary on s ...

UCSC ranked first in nation for research impact in physics

Feb 06, 2007

In a new analysis of research publications from top U.S. universities, the University of California, Santa Cruz, ranked first for the impact of its faculty in the field of physics and fifth in the field of space sciences. ...

Recommended for you

Orphaned children can do just as well in institutions

1 hour ago

The removal of institutions or group homes will not lead to better child well-being and could even worsen outcomes for some orphaned and separated children, according to new findings from a three-year study across five low- ...

Bronze Age wine cellar found

1 hour ago

A Bronze Age palace excavation reveals an ancient wine cellar, according to a study published August 27, 2014 in the open-access journal PLOS ONE by Andrew Koh from Brandeis University and colleagues.

Study identifies upside to financial innovations

4 hours ago

Financial innovations can make or break an economy. While the negative impact of financial innovation has been extensively covered, a new study of financial innovations before and during the last financial crisis indicates ...

User comments : 2

Adjust slider to filter visible comments by rank

Display comments: newest first

Jeddy_Mctedder
1 / 5 (2) Jul 09, 2012
he has wheels in his bat boots so he can land at 50mph. problem solved.
javjav
not rated yet Jul 18, 2012
The wingspan of acrobatic hang gliders can be as small as 8 meter (very risky, but still usable by highly skilled pilots). This is still bigger than the nominal 5 meter of Batman's cape. But an extra 1.5 meter wingspan required on each side does not seem difficult to achieve if the cape is made of hi-tech elastic material, as it seems to be in the movies. At landing time, just achieve a high angle of attack and the cape will be elongated for extra surface (it is a Delta shape, so the lift area also count where it inflate backwards). But the key trick that he always do is to dissipate the excess of kinetic energy by hitting a bad guy with his shock-absorbing boots